/Engine/Source/Editor/Sequencer/Public/MVVM/Extensions/ISnappableExtension.h
Return true to include the specified key in the snap field
virtual bool IsKeyApplicable ( [FKeyHandle](API\Runtime\Engine\Curves\FKeyHandle) KeyHandle, const [UE::Sequencer::FViewModelPtr](API\Editor\SequencerCore\FViewModelPtr) & Owner ) const